DE1297322B - Device for joining tubular, thermoplastic or plastic parts coated with such a material by friction welding - Google Patents

Description

1 2

The invention relates to a device for the mandrel facing the device, ready for binding of tubular, thermoplastic or with welding, as in F i g. 1 shown, plastic parts coated with such material. FIG. 4 shows a representation as in FIG. 3, however

by friction welding with a rotating and working with the second form of the outlet a counter-holding tool. 5 together a modified revolving mandrel,

In friction welding, the contact F i g. 5 shows a partial longitudinal section through a second

surfaces of the pieces to be welded, mostly Ro-Form of a welding device that tation body, by frictional heat on the required serves the same purpose as that of Fig. 1, Lent welding temperature brought and applied under F i g. 6 and 7 partial sections of details of a

due to pressure welded without additional material. io third or fourth form of training for this purpose become devices or welding devices of the same type as the previous ones as welding machines Machines are used that make it possible to do the things shown.

contact surfaces of the pieces to be welded The purpose of the present invention is the development

Rotating against each other sufficiently quickly under pressure is a development of a device for permanent bonding so that the surfaces by frictional heat on the 15 at least two parts, which are made of thermoplastic Welding temperature are heated. In the case of a material, exist or with such a material known device for making ventilated are coated. In numerous applications, Caps for a battery will be the chosen thermoplastic material to be bonded in relatively well Parts inserted into one another and are therefore used in a partially flexible, not rigid state, be it as a Weige secured against displacement and loosening, ao foil, as a pipe, as a wire, as a fitting or in This device is not designed to do two other ways. These are suitable z. B. polyvinyl, To connect parts to one another over a large area, d. H. Plain polyethylene and others.

on levels which move against each other The parts to be connected become against each other

can. led and held in this position. Then it will be

The object of the invention is to create a friction and a fastening direction on these parts which, despite the mere pressure on a limited surface part during a the parts to be connected to one another are exercised for a short period of time. In certain cases Friction welding in a simple way can reduce friction on the outside of at least one Establishes a free connection. The device is designed to do this by moving a friction surface in the parts be constructed that ζ. B. Plastic tubes in mass 30 zone in which the normally stationary production can be made, whereby the parts are touched, exercised, tubular tube body with the closure part In other cases, friction between the parts

to be joined by friction welding. to one another, and to this According to the invention, this object is thereby achieved, one of the parts can be held, selected, that at least one tool in the end the other is moved relative to the first, area of the processing zone of the parts to be connected The friction can be caused by

a seal against draining material and / continuous movement of the friction generating or a space to accommodate material abrasion surface (be it between the parts, be it on the is available. Outside of one of the parts) or through

Preferably, the rotating tool of 40 vibratory motion (swing motion) is this one surrounded by a fixed sleeve, which with a surface.

Shoulder is the working zone of the joint to be joined. Experience shows that a particularly good joint

Parts and with a surface the space for receiving bond between the parts on the basis of this Vorvon Material abrasion limited. walking is achievable. There is also the advantage that

According to a further embodiment of the invention 45 because of the high friction that is exerted, and if the rotating tool has a collar, which because of the very short friction duration, the Vercher the processing zone of the parts to be joined welding temperature in the joining zone is limited, the parts is reached quickly that in contrast

According to another embodiment of the invention - but the temperature of the other sections of the parts is the rotating tool with a recess for 50 is little changed. As a result, it is not Absorption of softened material provided. necessary to close the prefabricated part after assembly

According to a further embodiment of the invention, cool.

the seal consists of a metal ring. Advantage Another advantage is that when combined is the counter-holding tool completely or add the tightness between the components in the partially from a smooth, self-lubricating work- 55 near the point of contact is reached in order to materialize, preferably nylon. prevent softened material in the connection zone from

The invention is escaped with reference to in material and the adjacent areas of this Embodiments shown in the drawing zone covered. For this purpose, pressure-exerting means are included described in more detail. The drawing shows those working together to create a seal

F i g. 1 shows a partial longitudinal section of a first acting means.

form of a device for joining Finally, it is very important that the pressure

of a tubular element with a spout from testing at the beginning of the friction that it is exerted thermoplastic material; Position at the end of the friction-generating process Welding process, is maintained and that it is

F i g. 2 shows a longitudinal section of a first formation 65 ending of the friction process. With application form an outlet before welding, the words of which: pressure and friction must be equal

F i g. 3 shows a view like FIG. 2 act early with a second. Form of the outlet to which the circumferential friction welding can be used,

3 4

the surface 11 of the dome extends around parts of thermoplastic material with one another, and forms on to connect, regardless of the state of the Ma- this way between the head 5 and the sleeve 2 terials (flexible, semi-rigid, rigid, etc.), because the common one through passage 14 through the named components can during the connection welding of the outlet 7 loose particles in be held sufficiently, without the 5 an annular space 15 can thus be deducted, the The effectiveness of the procedure would be disrupted. between section 4 of the cathedral 1 and the

The method can be used anywhere there sleeve 2 is recessed.

where two components finally come together. The cap 3 is made of a smooth material,

Must be tied as soon as the parts are made of thermo-such as known under the name nylon plastic material exist or at least partially io material. This cap has an inlet opening 16, are wisely coated with such a material. those from the outside to the inside toric, cylindrical, toric The one used to carry out the welding process is conical. This inlet opening allows Device has a fixed component to keep it rounded in cooperation with the outer one of the parts to be connected, one with an Ant part of the collar 12 on the sleeve 2, the free one drive mechanism connected movable part to the 15 end of the tubular part 8 made of thermoplastic Generating the friction and bending over a pressure-exerting Or material and an edge strip 17 out, that leads the parts against each other. to build. The other end of the tubular part 8

In order to clearly support the device according to the invention against an adjustable stop 19, to make, are hereinafter referred to as the embodiment that surrounds the sleeve 2. This adjustable stop examples of two particularly advantageous operations 20 19 has a conical nose 20 on which treated: with expansion the end piece 18 of the tubular

The connection of a tubular thermoplastic part in the formation of the edge strip 17 postpones, see part with an also thermoplastic This conical nose allows especially that Component (that the outlet, the floor or the like. To compensate for differences in length between represents) to be welded to the outlets 7 one after the other in the manufacture of containers for different purposes Divider-like products or other similar tubular parts can exist. The privilege holder and the joining of two foils, which is from this facility is that for certain consist of thermoplastic material or thus materials such. B. Polyethylene, the expansion of the are coated, along a line or narrow end piece 18 of the tubular part 8, which in the Surface in the manufacture of various production 30 welding process occurs after removal nits such as B. Storage bags, packaging of the container shaped in this way does not remain, sag or the like while, in contrast, a deformation after

For the first application (connecting a pipe-type of a corrugated pipe, as it is to the tubular shaped part with a run-out part) are shown in part 8 in said connection process 1 to 7, several embodiments of a front 35 would be if the stop 19 is designed at right angles shown; the F i g. 8 gives a machine that would remain after being removed again. would. The cap 3 has between the entry

In the in F i g. 1 shown first embodiment opening 16 and a conical surface 21 against which In the form of a device, the following components are to be used to deny the outside of the collar 7.1 at the outlet 7: 40 is supported by an annular recess 22, which forms the out-in circumferential dome 1 with a drive forming a protruding bead on the organ is connected, a fixed, the dome 1 binding parts of the rim 17 of the tubular surrounding tubular sleeve 2, one with a part 8 and the collar of the outlet 7, pressure-exerting organ connected cap 3. Finally, the nylon cap around the collar 7.2 The circumferential dome 1 has at the end of its 45 of the outlet 7 around a metal ring 23 which Section 4 protrudes a double truncated cone during the welding process an inflow of factory-shaped Head 5, which expires in a pin 6, the material from which the outlet 7 consists, in the direction of for centering an outlet 7 made of thermoplastic collar 7.2 prevented.

Shem material is used, which by friction with Corresponding to a first embodiment of the

a tubular part 8, which is also made of thermo-50 outlet, as shown in FIG. 2 are shown on the plastic material is to be connected. Inner side 25 of the collar 7.1 of the outlet ribs 24 The head 5 of the dome 1 has a truncated cone. When attaching the spout on shaped support surface 9, on which normal- the head 5 of the dome is the ribbed inside wise the inside of the spout 7 rests. Around 25 without special precautions on the with Take the outlet through the dome to make it easier - 55 grooved support surface 9 of this head gotem, are in the support surface 9 grooves 10 along the sets. The ribs 24 can be continuous or sub-surface lines of the support cut. The support breaks must be executed. They prefer to run The surface 9 stands with the section 4 of the dome 1 along the surface lines of the inside 25. a frusto-conical section 11 in connection with FIG. 2 also shows that in this first

manure. 60 Form of the spout an annular groove 26 in the

The stationary sleeve 2 has a thread opposite the outside 27 of the outlet 7 the edge of the support surface 9 of the dome 1 is cut back provided neck 7.2. The incision 26 jumping collar 12, which surrounds the outlet 7 is relatively deep, up to about the middle of the and so the centrifugal flowing away of the height of the collar 7.1. The annular groove 26 can, by the way Outflow forming material in the actual 65 through a cylindrical surface 28 and through a cone welding process opposes. The federal government 12 is to be delimited by area 29. The cylinder surface 28 rounded on the outside; it runs against the inside of the can have a diameter that corresponds to the outer sleeve 2 on a conical surface 13, which is parallel to the diameter of the neck thread, and the same

5 6

Conical surface 29 leads to the outside and adjoins the element, composed of mandrel 1 and sleeve 2,

Area 27. Have.

The cap 3 of the device has a very As can be seen from FIG. 7, the tool

thin metal ring 23, the free end 30 of which also have a fixed mandrel 1 α , in addition one

over the conical section 21 of the cap vor- 5 rotating cap 3 α and a contiguous

is drawn and designed so that it is in the groove 26 component of cap 3 α and sleeve 2 a, or

engages the outlet and against the bottom of this a pressure mandrel 1 a, a rotating cap 3 and α

Groove presses. When the groove, as shown in FIG. 2 shown, a stationary sleeve 2 a. In both of these cases

Has a triangular cross-section, if the metal ring 23 is on, the holding members for the tubular part 8 α are cut obliquely from its free end 30. The io of the sleeve 2 a, the mandrel 1 α and a stationary one

However, the cross section of the groove 26 can also be formed differently from the stop 19 which is adjustable on the mandrel

be educated, and it is only required that that be.

free end 30 exactly in the bottom of this groove. 7 also shows that for molding

fits is. an edge strip 17 α on the tubular part 8 α in another, in the F i g. 3 and 4 dargestell- 15 of the rotating cap 3 α surrounding sleeve 2 a

th embodiment of the outlet is one from which an inlet opening 16 α is provided, which with the

Inside 25 of the outlet protruding annular bead inlet opening 16 on the cap 3 (Fig. 1) over-

31 pre-aligns in the area of the outer annular groove 26. This special design allows one

seen. The ribs 24 extend on both sides to the connection of the edge 17 α with the inside of the annular bead 31, but they can also over it 20 outlet Ta, while the tool according to FIG. 1 only

be led away. a connection to the outside of the spout 7

That allows for the connection of the outlet 7 after this.

second embodiment with the edge strip 17 of the various previously described execution tube-shaped Part 8 suitable tool can follow examples, in particular the one shown in FIGS. 1 and 7 look alike: 25 shown are not intended to restrict the invention Mandrel 1, the head 5 of which with the in F i g. 1 dark. So shows z. B. the F i g. 5 another exhibited matches, d. H. So a head, whose educational possibility of the device, the following Support surface 9 overall conical and with grooves, individual elements comprises:

is provided (FIG. 3), or a mandrel 1, the head 5 of which has a mandrel 1b consisting of one piece , or an incised ring 30 on its support surface 9, a mandrel which is rigid in the structure

shaped channel 32 opposite the bead 31 of the outlet directly the tubular thermoplastic

run s 7 has (Fig. 4); the straight grooves 10 part 8 b is striped, a free-running stop 19 b,

extend on both sides of the channel 32 or only on which is adjustable along the dome, a cap 3 b,

one side or over the entire incline of the top, in which case the retaining elements for the tubular surface 9, the channel 32, are enclosed. 35 shaped part 8 b by the free-running stop

To with the first-mentioned embodiment of 19 b and the outstanding from the cap 3 b

Device, the connection between an edge part can be formed.

To produce barrel 7 and a tubular part 8, the pressure-exerting element, such as a compressed air, is carried out as follows: An extractor cylinder and the rotary drive, such as a motor with barrel 7, are placed on the head 5 of the mandrel 1 and a tubular 40 Transmission gear, can with the device-shaped part 8 on the sleeve 2; one switches the to be connected in the following way: pressure-exerting member, such as a compressed air cylinder- The pressure-exerting member acts on the cap 3 b, the one to the cap 3 of the mandrel 1 and sleeve 2 and the rotary drive is with the mandrel 1 b connected to approach existing device part, whereby on the one hand or vice versa, or pressure-exerting organ and the edge strip 17 formed on the tubular part 8 45 rotary drive act together on the cap 3 b and on the other hand this edge strip 17 against the mandrel 1 b.

Outlet 7 is pressed; Then one connects the In each case the tubular part 8 b is between the mandrel 1 with the drive motor, so that the head 5 see the cap 3 b and the stop 19 b, which grips the outlet 7 and rotates and although it runs freely in itself, with the cap through which a friction between the outside of the outlet 50 tubular part 8 b is connected. In other words and the edge strip 17 causes; hence, the encryption th: when the cap 3 rotates b, and the connection runs made, the mandrel 1 is stopped, and impact-19 b to as the mandrel 1 b is stopped, and the pressure-applying member is moved so that when the cap 3 b is stationary, the stop cap 3 is also resting; then the finished rohrför- 19 is b, while the mandrel rotates. In which the inventor peeled off the container. 55 dung non-limiting example is the abutment In this first embodiment of the tool formed as a ball bearing 19b, which is over the mandrel Ib, the holding members of the thermoplastic pipes are striped and rests on an adjusting ring, shaped part 8 through the fixed sleeve 2, the F i g. 5 also shows that the head 5 b of the group consisting of peripheral portion of the cap 3 and a fixed arrival one piece mandrel 1 b a conical shock 19, but in which the sleeve can be adjusted along 60 bearing surface 9 b has and an annular Verkann formed. Furthermore, the mandrel 1 can rotate, recess 33 cut into the support surface. but do not move in the direction of the axis of rotation. This recess takes up softened thermoplastic (only one degree of freedom), and the cap 3 exerts pressure on material of the outlet which, under the pressure, cannot rotate (only one degree of freedom tends to flow away Specialization degree). The tool can, equipped with the same part of the support holding members surrounding the recess on the outside, a fixed cap 3, a surface 9 b for sealing, rotating mandrel 1 and a pressure-exerting construction The mandrel 1 b can, regardless of whether a recess

33 is cut or not, have an annular recess 34 which is let in in the vicinity of the support surface 9b; the recess gradually merges into the body and on the other side into the headboard. Any abrasion of the thermoplastic material can be collected in the recess; there is sufficient space so that it does not lie against the inner wall of the tubular part. Outwardly escaping material can thus be caught either by the recess 33 and / or the recess 34 (FIG. 5) or by the circumferential collar 12 of the sleeve 2 (FIG. 1).

It can be added 35 which (F i g. 7) is provided as a projection on the cap 3 as a boundary of the bearing surface 21a is formed and the outlet 7 surrounds α by an annular collar; the collar 35 has the same effect as the collar 12.

So far, with reference to FIG. 1 a first embodiment of a device has been described, with which the friction between the outlet 7 and the edge strip 17 required for the connection of the tubular part 8 is caused. For this purpose, ribs 24 and projections are attached to the outlet or incisions of any shape are provided on the support surface 9 of the dome 1.

You can generate friction on the inside of the spout 7 c with the same device so that the surface of the outside of this spout connects to the edge 17 c of the tubular part 8 c, provided that certain changes are made, as they are, for. B. in Fig. 6 are shown. The head 5 c of the dome 1 c has a friction-exerting support surface 9 c, the extent of which is limited to a surface part which lies opposite the edge strip 17 c, that is to say the contact and connection zone; the rest of the support surface remains free. The support surface 9 c is preferably made of metal and is roughened, while the cap 3 c is at least partially made of a smooth, self-lubricating material, such as. B. nylon. The illustrated embodiment has a cap which is made of metal in the region of the edge 17 c , which surrounds a nylon ring 36 which touches the outside of the outlet 7 c.

The two possibilities given (friction between the parts or friction on the outside at least one of the parts) are of course also in differently designed devices, in particular in the case of devices according to FIGS. 5 and 7 are conceivable.

All the devices shown allow the connection by covering, and for this purpose they have means for forming an edge strip 17 on the tubular part 8. It is also possible to use the device to connect the outlet 7 at its edge to the inside of the tubular element. For this purpose, those holding members which are arranged opposite the free end of the tubular part (ie the cap 3 in FIG. 1 or the sleeve la in FIG. 7) have a cylindrical centering opening and a stop shoulder (not shown). As a result, the free end of the tubular part 8 is precisely aligned on the outside by the aforementioned holding members, while the cap 3 and the mandrel exert pressure and friction on the outlet 7 in order to soften the outlet, to push it outwards and so on to connect to the inside of the tubular part 8.

The embodiments of the device described above relate to a very simple one Structure of the device because it was assumed to explain what has been shown that one after the other a tubular container, then another type of container and so forth is made. It is also mass production makes it possible to manufacture a large number of containers and the process at the same time to repeat in quick succession.

Claims (6)

Patent claims: 1. Device for connecting tubular, thermoplastic or plastic parts coated with such a material by friction welding with a rotating and a counter-holding tool, characterized in that at least one tool (1, la, Ib, Ic, 3, 3a, 3b, 3c) in the area of the processing zone of the parts to be connected (7, 8, 7 a, 8 a, 7 c, 8 c) a seal (9 b, 23, 35) against draining material and / or a space (15, 34) for receiving of material abrasion is present. 2. Device according to claim 1, characterized in that the rotating tool (1) is surrounded by a stationary sleeve (2), which with a shoulder (12) the processing zone of the parts to be connected (7, 8) and with a surface (13) delimits the space (14, 15) for receiving material abrasion. 3. Apparatus according to claim 1, characterized in that the rotating tool (3 ä) has a collar (35) which delimits the processing zone of the parts to be connected (7 a, 8 a). 4. Apparatus according to claim 1, characterized in that the rotating tool (1 b) is provided with a recess (33) for receiving softened material. 5. Apparatus according to claim 1 or 2, characterized in that the seal (23) from consists of a metal ring. 6. Device according to one of the preceding claims, characterized in that the counter-holding tool (3, 3 c) wholly or partially made of a smooth, self-lubricating Material, preferably nylon, consists. 1 sheet of drawings 909 524/385